# Polyscope not booting **URL:** \ **Category:** Technical Questions\ **Created:** [April 15, 2021, 4:57pm UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656 "2021-04-15T16:57:38Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![anon3790689](https://avatars.discourse-cdn.com/v4/letter/a/5daacb/32.png) [@anon3790689](https://forum.universal-robots.com/u/anon3790689)\ **Post date:** [April 15, 2021, 4:57pm UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/1 "2021-04-15T16:57:39Z")
I am using UR10e. Initially I had polyscope with 5.31 and then I updated it to 5.10. Later on, I tried to downgrade again to 5.3.1. After installing the 5.3.1, polyscope is not booting. Screen flashes twice and after that it is completely black. During the installation, there was no error. ---
**Author:** ![anon32693620](https://avatars.discourse-cdn.com/v4/letter/a/6a8cbe/32.png) [@anon32693620](https://forum.universal-robots.com/u/anon32693620)\ **Post date:** [April 15, 2021, 6:38pm UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/2 "2021-04-15T18:38:40Z")
Did you follow the [Legacy guide](https://www.universal-robots.com/articles/ur/documentation/legacy-download-center/) for updating the Robot properly? From how you put it; it sounds like you should have gone from 5.3 → 5.4 → 5.5 → 5.10. Edit: Look at the Note on the Legacy Guide about Downgrading. It looks like it currently is not supported and will cause issues like you are seeing. ---
**Author:** ![anon3790689](https://avatars.discourse-cdn.com/v4/letter/a/5daacb/32.png) [@anon3790689](https://forum.universal-robots.com/u/anon3790689)\ **Post date:** [April 15, 2021, 10:07pm UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/3 "2021-04-15T22:07:44Z")
Thanks for your reply. I followed incremental update procedure. Is it possible to recover the system? ---
**Author:** ![efn](https://avatars.discourse-cdn.com/v4/letter/e/35a633/32.png) [@efn](https://forum.universal-robots.com/u/efn)\ **Post date:** [April 16, 2021, 5:20am UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/4 "2021-04-16T05:20:22Z")
Hello Miftahur, It should be possible to flash a new image to the USB-drive. You will find information regarding this on the Legacy Download Page, as well. Go to the section ROBOT IMAGE LEGACY (FULL IMAGE). [https://www.universal-robots.com/articles/ur/documentation/legacy-download-center/](https://www.universal-robots.com/articles/ur/documentation/legacy-download-center/) Make sure to follow the procedure explained in the guide. 🙂 You will need to at least back up your calibration files and move these to the new image. ---
**Author:** ![anon3790689](https://avatars.discourse-cdn.com/v4/letter/a/5daacb/32.png) [@anon3790689](https://forum.universal-robots.com/u/anon3790689)\ **Post date:** [April 16, 2021, 8:53am UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/5 "2021-04-16T08:53:35Z")
Thanks @efn. I have checked the guide for image installation. I do have few queries. 1. Guide says, e-series controller use SD card. How can I access the SD card? I am unable to locate it. I only see usb port in the teach pendant. 2. Do you have any contact for Universal robot support? ---
**Author:** ![efn](https://avatars.discourse-cdn.com/v4/letter/e/35a633/32.png) [@efn](https://forum.universal-robots.com/u/efn)\ **Post date:** [April 16, 2021, 9:29am UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/6 "2021-04-16T09:29:36Z")
That’s my bad. There’s no USB drive in the e-series. 🙂 the SD card can be located beside the fuse and Teach Pendant connector inside the cobtroller. You’ll need a card reader to flash the new image. I’m a technician at BILA in Denmark. We’re a Danish distributor of the robot, so we’re basically Universal Robots service/support, too. ---
**Author:** ![anon3790689](https://avatars.discourse-cdn.com/v4/letter/a/5daacb/32.png) [@anon3790689](https://forum.universal-robots.com/u/anon3790689)\ **Post date:** [April 16, 2021, 10:17am UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/7 "2021-04-16T10:17:10Z")
Thanks @efn. I will try the solution. ---
**Author:** ![anon6962979](https://avatars.discourse-cdn.com/v4/letter/a/ea5d25/32.png) [@anon6962979](https://forum.universal-robots.com/u/anon6962979)\ **Post date:** [August 9, 2022, 6:29pm UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/8 "2022-08-09T18:29:58Z")
Hi there. I have a question: if the polyscope is running perfectly, do I need to install a full image? I did a polyscope update from 5.7 to 5.11 and there is no issue with the robot. What is the function of the full image? Thanks for your time ---
**Author:** ![efn](https://avatars.discourse-cdn.com/v4/letter/e/35a633/32.png) [@efn](https://forum.universal-robots.com/u/efn)\ **Post date:** [August 10, 2022, 6:22am UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/9 "2022-08-10T06:22:11Z")
Hello Ivan, You only need to install a new image, if the operating system is somehow corrupt. 🙂 Or if you are replacing the SD-card/USB in case of faulty hardware. ---
**Author:** ![anon6962979](https://avatars.discourse-cdn.com/v4/letter/a/ea5d25/32.png) [@anon6962979](https://forum.universal-robots.com/u/anon6962979)\ **Post date:** [August 30, 2022, 3:52pm UTC](https://forum.universal-robots.com/t/polyscope-not-booting/13656/10 "2022-08-30T15:52:16Z")
thanks for your answer, it make sense. I wish you a great day, greatings!